Closure for fuel tanks



Sept. 10, 1929.,

A. M. MALLUK 1,727,476

CLOSURE FOR FUEL TANKS Filed Nov. 30, 1926 2 Sheets-Sheet l INVENTOR flssaa/ x9. Mal/a1 i LL 4 ATTORNEY p 1929- A. M. MALLUK 1,727,476

CLOSURE FOR FUEL mugs Filed Nov. 30, 1926 2 Sheets-Sheet 2 INVENTOR flssad/V. #41740? ATTORNEY Patented Sept. 10, 1929.

UNITED STATES ASSAD M. MAIIIAUK, OF NEW YORK, N. Y.

CLOSURE non. FUEL TANKS.

Application filed November 30, 1926. Serial No. 151,812.

The object of the present invention is to provide a closure particularly adapted for fuel tanks of all kinds, such as metal barrels for the transport of oil, metal tanks for the storage of oil, including underground-tanks, etc., and also tanks for other liquids such as chemicals, essentialoils, etc.

The invention will be understood by reference to the accompanying drawings, in which Figure 1 is a planview of an embodiment of the invention applied to a tank, and

Figure'2 is a sectional elevation through the same; I

1 Figure 3 is a bottom plan view of the looking lugs and associating mechanism;

Figures 4 and 5 are respectively a sectional fragment and a'bottom plan view of a modified form of device;

vice, such as illustrated in Figures 4 and 5, having, anchoring means with the drain outlet closure, the arrangement bein such that the latter can be removed only 1; rough the prior removal of the filler cap, which is provided with a lock.

Referring to Figures 1 and 2 of the drawings, 1 indicates a tank for containing oil, 2 a threaded filler opening therein and 3 a filler plug. .At the right of the filler "plug is a second threaded opening 4 provided with a plug 5.

The filler plug 3 is preferably of metal and is provided with a lateral flange 3* to contact with the upper wall of the tank. The deending threaded projection of the plug may e encircled with a yielding washer 6 so as to make the threaded connection leak-proof.

The locking parts are as follows:- Rotatably fitted within an axial aperture formed in plug 3 is a stem 7. At its lower end the stem projects within a disk-like recess formed in the base of plu 3 and is secured by screw 8 to an actuating isk 9. Stem 7 constitutes a lock element and is formed with a key-slot to receive a key 10. Associated with stem 7 will be means adapted to lock the stem against rotation, which means will be released from the stem when the key is inserted in the slot. The specific lock mecha- Figure 6 is a sectlonal'elevation of a dc:

nism forms no part of the present invention and is indicated, without detailing, .in the drawings, the latter showing spring-pressed {{umblers 11 adapted to be engaged by theactuating disk 9 is provided at opposite pointswith pins 12, 12*. Pin 12 enters slot 13 of a locking dog 13, and pin 12 enters the slot 14* of a locking dog 14. Reference to Flgure 3 will show that rotation of actuating disk 9 from the position therein shown will move the locking dogs toward each other until their ends come within the boundary of plug 3, enabling rotation and Withdrawal of the latter from the tank. In order to prevent leakage via stem 7, I have provided intermediate'disk 9 and the upper wall of the disk-like recess formed in plug 3, a packing washer 15 which may be of any sultable resilient or elastic material and of such nature as to form an adequate seal against the passage of the oil.

The locking dogs 13, 14 may be secured to the plug body b means of a plate held by studs 17 The ings formed in depending flange 18 (Figure g) of the plug 3 and plate 16 abuts the said an e. Y

T e modified form of'device illustrated in Figures 4, 5 and 6 comprises locking dogsso 19, 20, and the slot 19 of dog 19 receiving an operating pin 21 on actuating member 22', and the slot 20 of locking dog 20 receiving a in 21 on actuatin member 22. The actuatlng member is carried at the lower end of a key receiving stem 23 adapted to be entered a by a key 24,'the stem 23f orming a locking member of such nature that'thc locking dogs may be manuall moved toward each other against the tension of a coil spring 25, one

' end of which engages dog 19 and the other end of which is fixed on theplugbby means of screw 26. The plug ma then e inserted in the filler opening, the ogs engaging the threaded portlon thereof and permitting roo5 tation of the plug until the dogs are carried below the threaded portion of the filler opening and enable spring 25 to move dog 19 outwardly and in lockin position, such movement imparting a slig t rotation to ac- 101 ogs project through open- 75 tuating member 22 and thereby moving outwardly the second dog 20, the parts assuming the position illustrated in Figure 6.

When the filler-cap is applied to motor fuel tanks or the like, provided with drain plugs at their base, for the removal of the sediment, I have provided means whereby the drain plug cannot be removed unless the filler plug or cap is unlocked and removed. Thus the drain plug is controlled by the key-lock of the filler plug or cap. To this end the drain plug '27 is elongated. The lower section 27* thereof is made slightly conical so that when the plu is screwed upwardly to closed position,

its limit of upward movement will be reached. Attached tothe upper end of plug 27 is a flexible connection 28 with a hook 29, the latter being removably attached to an eye 30,

provided with a single longitudinal aperture, a stein afforded a bearing by the walls of said aperture and adapted to receive a key, the stem forming a lock element rotatable by said 'key, a packing surrounding the same, an actu- ASSAD M. MALLUK.

swiveled about a connection 31 with the filler plug or cap. If an attempt be madeto removedrain plug 27 while the filler cap is in position and locked, rotation of said drain plug 27 will move the plug downwardly until the slack is taken out of flexible connection 28. Further downward movement of plug will be prevented because it will be resisted by flexible member 28 becoming taut. Rotation. of the drain plug will not twist and break the flexible connection 28 because of its swivel connection with the filler cap or plug. In order to remove the'drain plug it is necessary to unlock the filler cap or plug and remove it from the tank whereupon hook 29 may be released from its swivel connection.

Where the filler opening of a tank is employed in conjunction with a plug such as 5,

plug may be employed to lock the secondar a plug 5. To thisend I connect the two wit a strong-chain 31 which may be either at the outside of the tank or on the interior thereof. By such arrangement, as seen in Figures 1 tion at 5 so that the ventilatingmay take place without removing the plug from the tank. f

Having described my invention what I claim and desire to secure by Letters Patent is as follows a 1. The' combination'of a fuel tank having a filler opening and a second opening, a 010- sure for the filler opening, said closure having locking means whereby it may be locked to the tank, a closure for the second opening and Figures 1 and 2, the lock for the filler cap or.

a'connection between the second openin closure and the filler opening closure where y the latter, when locked, serves to prevent removal of the second opening closure. I

2. In combination with a fuel tank having a filler opening, a closure for said opening, 

